There are more ways to derive instruction from books than the direct and chief one of applying the attention to what they contain. Things connected with them, by natural or casual association, will sometimes suggest themselves to a reflective and imaginative reader, and divert him into secondary trains of ideas. In these, the mind may, indeed, float along in perfect indolence and acquire no good; but a serious disposition might regulate them to a profitable result.... Even in the most cursory notice of them, when the attention is engaged by no one in particular, ideas may be started of a tendency not wholly foreign to instruction. A reflective person, in his library, in some hour of intermittent application, when the mind is surrendered to vagrant musing, may glance along the ranges of volumes with a slight recognition of the authors, in long miscellaneous array of ancients and moderns. And that musing may become shaped into ideas like these:--What a number of our busy race have deemed themselves capable of informing and directing the rest of mankind! What a vast amount is collected here of the results of the most strenuous and protracted exertions of so many minds! What were in each of these claimants that the world should think as they did, the most prevailing motives? How many of them sincerely loved truth, honestly sought it, and faithfully, to the best of their knowledge, declared it? What might be the circumstances and influences which determined in the case of that one author, and the next, and the next again, their own modes of opinion? And how much have they actually done for truth and righteousness in the world? Do not the contents of these accumulated volumes constitute a chaos of all discordant and contradictory principles, theories, representations of facts, and figurings of imaginations? Could I not instantly place beside each other the works of two noted authors, who maintain for truth directly opposite doctrines, or systems of doctrine; and then add a third book which explodes them both? I can take some one book in which the prime spirits of the world, through all time, are brought together, announcing the speculations which they, respectively, proclaimed to be the essence of all wisdom, protesting, with solemn censure or sneering contempt, against the dogmas and theories of one another, and conflicting in a huge Babel of all imaginable opinions and vagaries....